Patents by Inventor Wang Ai Guo

Wang Ai Guo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Utility knife
    Patent number: D551932
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: October 2, 2007
    Inventor: Wang Ai Guo
  • Utility knife
    Patent number: D551933
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: October 2, 2007
    Inventor: Wang Ai Guo